The asthenosphere is a part of the upper mantle just below the lithosphere that is involved in plate tectonic movement and
sastatic adjustments. which is not true about the role of the asthenosphere in plate tectonics?
the asthenosphere is broken up into seven very large continental- and
ocean sized plates
convection currents generated within the asthenosphere push magma
upward through volcanic vents and spreading centers to create new crust.
heat from deep within earth is thought to keep the asthenosphere
malleable, lubricating the undersides of earth's tectonic plates and
allowing them to move
according to the theory of plate tectonics, the asthenosphere is the
repository for older and denser parts of the lithosphere that are dragged
downward in subduction zones